WO2012089153A1 - 一种室内定位移动终端的系统及方法 - Google Patents

一种室内定位移动终端的系统及方法 Download PDF

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Publication number
WO2012089153A1
WO2012089153A1 PCT/CN2011/084985 CN2011084985W WO2012089153A1 WO 2012089153 A1 WO2012089153 A1 WO 2012089153A1 CN 2011084985 W CN2011084985 W CN 2011084985W WO 2012089153 A1 WO2012089153 A1 WO 2012089153A1
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WO
WIPO (PCT)
Prior art keywords
mobile terminal
information
positioning
node
control
Prior art date
Application number
PCT/CN2011/084985
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English (en)
French (fr)
Inventor
沈爱民
李美祥
Original Assignee
国民技术股份有限公司
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Publication date
Application filed by 国民技术股份有限公司 filed Critical 国民技术股份有限公司
Priority to US13/976,692 priority Critical patent/US20130281117A1/en
Publication of WO2012089153A1 publication Critical patent/WO2012089153A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a system and method for indoor positioning mobile terminals.
  • a "very high frequency radio frequency IC card device” (application number: 200710124354. 7) discloses a 2. 4 GHz radio frequency IC card device applied to a mobile terminal device and an implementation method thereof.
  • a typical application of this 2. 4 GHz RF IC card device is to mount the RF IC card device into the mobile phone and control the 2. 4 GHz RF communication distance within a certain range, thereby realizing the function of the mobile phone card at a close distance. Since the 2. 4 GHz RF IC card device can greatly change people's daily payment methods and provide convenience for people's lives, it will surely be widely used in daily life.
  • LBS location-based information services
  • the traditional methods of locating mobile terminals mainly include GPS, GSM base stations and Zigbee positioning.
  • the GPS positioning method is not suitable for indoor or relatively closed environments because it is obscured by buildings, weather factors and satellite signal interference.
  • the GSM positioning method is based on cellular mobile communication, and its positioning accuracy is low, generally above 50m, and its The uplink and downlink communication will also be affected by the shielding effect of the building. Especially in the large indoor environment where the crowd is concentrated, the communication situation is bad, and the positioning function is difficult to realize.
  • Zigbee positioning method is mainly used for short-distance networking and control communication in industrial sites. Zigbee module is not ubiquitous in mobile terminals that people use every day. Therefore, using Zigbee to achieve positioning requires specific mobile terminal equipment, which is costly. , not suitable for everyday use with people.
  • the technical problem to be solved by the present invention is to provide a system and method for indoor positioning of a mobile terminal according to the deficiencies of the prior art, which can quickly and accurately locate the existing mobile terminal located indoors, and conveniently locate the tube, which is convenient. People's use.
  • the present invention adopts the following technical solutions:
  • the present invention discloses a system for indoor positioning of a mobile terminal, comprising: a control end, at least one positioning node installed indoors; wherein the positioning node is configured to be in the specific area under the control of the control end Transmitting, by the mobile terminal, the connection information, and receiving the response information of the response of the mobile terminal, measuring the signal strength of the response information, and transmitting the response information and the signal strength information to the control terminal; The received response information and the signal strength information are analyzed and calculated to locate the mobile terminal.
  • the control end includes a background and a control node connected to the background; the control node is configured to control the positioning node to send connection information to the mobile terminal, And transmitting the received response information and signal strength information to the background together with the number information of the positioning node stored therein; the background is used to analyze the response information and the signal strength information Calculation.
  • the mobile terminal is a mobile terminal equipped with a 2.4 GHz radio frequency IC card.
  • the positioning node includes a radio frequency interface device, an amplifying circuit, and a radio frequency transmitting and receiving antenna connected in sequence; the radio frequency interface device is wiredly connected to the control node; The antenna is wirelessly connected to the mobile terminal, and configured to send the connection information and receive the response information.
  • the frequency bands of the radio frequency interface device and the radio frequency transceiver antenna are both 2. 4 GHz.
  • the control node includes a microcontroller and a multi-connector connected thereto; the microcontroller passes the multi-way connector and the at least one positioning And a node wired connection, configured to control, by the positioning node, transmission power of the connection information and the connection information to the mobile terminal, and return the response information, the signal strength information, and the number information of the positioning node to the background.
  • the background is connected to the at least one control node in a bus manner.
  • the background performs analysis and calculation on at least the response information and the signal strength information returned by the two or more positioning nodes to achieve accuracy on the mobile terminal.
  • the specific manner is: the background is the first positioning node that returns the response information as the original positioning node, and finds the surrounding positioning node of the original positioning node according to the record information of the original positioning node stored in the background;
  • the background control by the control node, the peripheral positioning node to send connection information to the mobile terminal, and receive response information and signal strength information returned by the peripheral positioning node;
  • the background response message returned by the background according to the original positioning node and the surrounding positioning node The information and signal strength information are subjected to comprehensive analysis and calculation to achieve accurate positioning of the mobile terminal.
  • the present invention also provides a method for indoor positioning of a mobile terminal, comprising the following steps:
  • the control terminal controls the positioning node to send the connection information to the mobile terminal in a specific area, and receives the response information of the mobile terminal response received by the positioning node, and the signal strength information of the response information measured by the positioning node;
  • the control terminal analyzes and calculates the response information and the signal strength information to locate the mobile terminal.
  • the control terminal includes a background and a control node connected to the background, and the mobile terminal is a mobile terminal equipped with a 2. 4 GHz radio frequency IC card;
  • the positioning node sends connection information to the mobile terminal equipped with the radio frequency IC card under the control of the control node;
  • the positioning node receives response information of the response of the mobile terminal, and measures signal strength of the response information
  • the background analyzes the received response information and signal strength information to locate the mobile terminal.
  • the invention has the beneficial effects that: the positioning node sends the connection information to the mobile terminal in a specific area under the control of the control end, and receives the response information of the response of the mobile terminal, and measures the signal strength of the response information. And transmitting the response information and the signal strength information to the control end, and the system design for analyzing and calculating the received response information and the signal strength information through the control terminal, so that no need is more In the case of changing the existing mobile terminal, the precise positioning of the indoor mobile terminal is realized, and the positioning cylinder is convenient for people to use, and has wide applicability.
  • FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a positioning node according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a control node according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of integrated measurement of a multi-positioning node according to an embodiment of the present invention. detailed description
  • the present invention proposes a system and method for indoor positioning mobile terminal.
  • the concept of the invention is: through a specific positioning node and a mobile terminal existing in a certain area (such as indoors, a relatively closed environment or a densely populated environment), especially with a 2. 4G radio frequency IC card device.
  • the system for locating a mobile terminal in the present invention includes: a control end, at least one positioning node installed indoors; and a positioning node configured to send connection information to the mobile terminal in a specific area under control of the control end; Receiving response information of the response of the mobile terminal, measuring the signal strength of the response information, and transmitting the response information and the signal strength information to the control terminal; the control terminal is configured to analyze and calculate the received response information and the signal strength information to The mobile terminal performs positioning.
  • the indoor positioning mobile terminal system can be used in indoor environments such as large shopping malls and entertainment places; however, it should not be understood to be applicable only to indoor environments, and can also be used in other relatively closed environments, such as underground. In parking lots, tunnels, or other densely populated environments, it is sufficient to have a fixed location in the tighter environment.
  • the positioning node transmits the connection information only in a specific area, and the range of the specific area is small. That is to say, the coverage of the connection information transmitted by the positioning node is 4 ⁇ small, generally about 20 m. Therefore, if the mobile terminal can receive the connection information sent by the positioning node, it indicates that the distance between the mobile terminal and the positioning node is very close, so that the requirement of the lowest positioning accuracy can be initially satisfied.
  • the existing base station positioning or GPS positioning mode generally has a positioning error of several tens of meters or hundreds of meters. If it is affected by weather, buildings, etc., its positioning accuracy will be lower.
  • the control terminal can perform according to the more accurate signal strength information. Positioning, so that the positioning accuracy of the positioning mode is higher than the GSM positioning mode and the GPS positioning mode.
  • control end specifically includes a background and a control node connected to the background; the control node is connected to the positioning node, and is configured to control the positioning node to send connection information to the mobile terminal, and the received response information and signal strength information are stored together with the self-stored
  • the numbering information of the positioning node is transmitted to the background together; and the background is mainly used for analyzing and calculating the received response information and the signal strength information of the response information to locate the mobile terminal.
  • the background can be software running on a computer and system record information storing the location of each control node.
  • the background is connected to at least one control node by bus, and uses a certain software algorithm to analyze and calculate the response information and signal strength information fed back by the control node, and then locate the mobile terminal.
  • the background can also be connected to multiple control nodes, so that the response information and the signal strength information fed back by the multiple control nodes can be analyzed and calculated, thereby accurately positioning different mobile terminals.
  • the mobile terminal is a mobile terminal equipped with a 2.4 GHz radio frequency IC card.
  • a mobile terminal equipped with a 2.4 GHz radio frequency IC card This choice is mainly because the mobile terminal can communicate in a short distance and has a mobile payment function such as an electronic wallet, which is bound to be widely used in people's daily life. Since the frequency band of the existing RF IC card is based on 2.4 GHz, the RF IC card with the frequency band of 2.4 GHz can be selected here.
  • a mobile terminal equipped with a 2. 4 GHz radio frequency IC card wireless communication between the mobile terminal and the positioning node in a short distance can be realized, thereby realizing precise positioning of the mobile terminal. Therefore, it is possible to perform accurate indoor positioning of the mobile terminal without changing the existing mobile terminal equipped with the 2. 4 GHz radio frequency IC card, and the positioning method is simple, which is convenient for people to use.
  • the positioning node includes a radio frequency interface device, an amplifying circuit, and a radio frequency transmitting and receiving antenna, which are sequentially connected to each other;
  • the radio frequency interface device is used for receiving a wired connection with the control node, and is configured to receive a control command issued by the control node, and Transmitting the response information and the signal mild information to the control node to ensure normal data information interaction between the positioning node and the control node;
  • the radio frequency transceiver antenna is wirelessly connected with the mobile terminal, and is used for transmitting the connection information and receiving the response information returned by the mobile terminal.
  • the frequency band of the radio frequency IC card in the mobile terminal is 2.4 GHz
  • the frequency band of the radio frequency transceiver antenna is selected to be 2.4 GHz, because only in this way, normal mobile communication within a short distance between the positioning node and the mobile terminal can be ensured.
  • the frequency band of the RF interface device is also selected to be 2. 4 GHz, so as to ensure normal communication between the positioning node and the control node.
  • the positioning node is fixedly installed at a specific position in the room to ensure that it is less interfered by various external objects within the coverage area; and the positioning node is short-distance with the mobile terminal equipped with the 2. 4 GHz radio frequency IC card.
  • the communication distance of communication is within a certain radius centered on the positioning node.
  • this certain radius range is referred to as the coverage of the positioning node, and as long as the mobile terminal is within the coverage of the positioning node, wireless communication with the positioning node can be performed.
  • the radius of coverage of the positioning node is less than 20m.
  • the positioning node transmits the connection information in the coverage of the frequency range of the 2. 4 GHz frequency sequence in the coverage of the control node under the control of the control node; the radio frequency IC card in the mobile terminal is in the sequence of 2. 4 GHz frequency If one of the frequency points is in the coverage of the positioning node, the mobile terminal can receive the connection information sent by the positioning node and return the response information. If the mobile terminal is not within the coverage of the positioning node, the mobile terminal cannot receive the information. Connection information. As long as the positioning node and the mobile terminal are successfully connected, the background information of the mobile terminal can be obtained by calculating in the background.
  • the accuracy of the response message received by the mobile terminal by the positioning node is higher.
  • the method for locating the mobile terminal can improve the positioning accuracy on the one hand, and the wide applicability of the positioning method on the other hand.
  • the wired interface device and the control node adopt a wired connection manner, so that the response message and the signal strength message received by the control node can be almost unaffected by the external environment, and smoothly transmitted to the background and processed accordingly, thereby ensuring The normal work of the system.
  • the RF interface device and the control node can also be connected wirelessly.
  • the control node includes a controller MCU and a multi-connector connected thereto; the microcontroller is wiredly connected to the at least one positioning node through the multi-way connector, specifically, the radio frequency in the positioning node
  • the interface device is connected, and is mainly used to control connection information sent by the positioning node to the mobile terminal and the transmission power of the connection information.
  • the response information and signal strength information returned by the positioning node are returned to the background.
  • the control node can expand or reduce the coverage area of the positioning node by adjusting the transmission power of the connection information sent by the positioning node, so that the positioning accuracy of the mobile terminal can be flexibly adjusted to a certain extent.
  • At least the response information returned by the two positioning nodes or the two or more positioning nodes is analyzed and calculated to achieve accurate positioning of the mobile terminal.
  • the specific manner is as follows:
  • the first positioning node that returns the response information is used as the original positioning node, and the location of the mobile terminal determined by the original positioning node is determined as the initial positioning position.
  • the background finds the surrounding positioning node of the original positioning node according to the record information stored in the original positioning node of the original positioning node; when searching for the surrounding positioning node, at least one peripheral positioning node or more surrounding positioning nodes are found in the background.
  • the background controls the peripheral positioning node to send the connection information to the mobile terminal respectively, and receives the response information returned by the surrounding positioning node.
  • the background performs comprehensive calculation according to the response information and the signal strength information returned by the original positioning node and the surrounding positioning node. Achieve precise positioning of mobile terminals.
  • the background first analyzes and calculates the response information returned by the original positioning node, and determines the initial positioning position of the mobile terminal. Then, the response information returned by the neighboring positioning node of the original positioning node is analyzed and calculated, and the distance between the original positioning node and the mobile terminal, the distance between the surrounding positioning node and the mobile terminal are comprehensively compared, thereby determining the mobile terminal. Finally locate the location.
  • the comprehensive measurement of the plurality of positioning nodes the positioning accuracy is improved, and the mobile terminal is more accurately positioned to meet the needs of the positioning accuracy.
  • the peripheral positioning node does not need to have all the frequency points of 2. 4 GHz.
  • the connection information is sent on the sequence, and only needs to be sent on the channel address of the 2.4G frequency sequence generated by the response information of the mobile terminal that is successfully connected by the original positioning node.
  • the positioning system comprises: a mobile terminal 101, a positioning node 102, a control node 103 and a background system 104.
  • the mobile terminal 101 is a mobile terminal equipped with a 2. 4G radio frequency IC card device.
  • the positioning node 102 is composed of a radio frequency interface device 201, a signal amplifying circuit 202, and a 2. 4G radio frequency transmitting and receiving antenna 203 operating in the 2. 4G frequency band.
  • the positioning node 102 is connected to the control node 103 by a wired connection, receives control commands of the control node 103, and feeds back data information.
  • control node 103 includes a microcontroller MCU 301 and a multiplexer 302.
  • the control node can be coupled to one or more positioning nodes via multiplex device 302.
  • the background system 104 can be a software running on a general purpose computer and system record information storing the locations of the nodes.
  • FIG. 4 is a schematic diagram of integrated measurement of a multi-positioning node according to an embodiment of the present invention. The working flow of the indoor positioning mobile terminal system is described in detail below with reference to FIG. 4, as shown in FIG. 4:
  • the mobile terminal 404 equipped with the 2. 4G radio frequency IC card is located in the indoor motion plane 406 and enters a location 405 in the coverage area 402 of the A location node;
  • the mobile terminal 404 is at a random frequency point of the 2. 4G frequency sequence, and the control node 103 controls the positioning node A to send the connection information at all frequency points of the 2. 4G frequency sequence;
  • the mobile terminal 404 responds to the connection information sent by the positioning node A, and returns corresponding response information, where the response information includes the unique identification number of the mobile terminal itself;
  • the positioning node A receives the response information, and measures the signal strength of the response information. And sending the response information and the signal strength information of the response information to the control node 103;
  • the control node 103, the number of the positioning node A, together with the received response information returned by the mobile terminal 404 and the signal strength information measured by the positioning node are fed back to the background 104;
  • the background 104 ⁇ according to the number of the location node A, it is determined that the mobile terminal 404 is within the range of 20m centered on the installation location of the location node A, thereby achieving the initial positioning of the target; at this time, the positioning node A is referred to as the original positioning node ;
  • the background 104 finds the information of the neighboring positioning nodes B and C of the original positioning node A from the record information stored in the background itself;
  • the peripheral positioning nodes B, C respectively send the connection to the mobile terminal 404 in sequence on the channel address of the 2.4G frequency sequence generated by the response information of the response of the successfully connected mobile terminal 404.
  • the information is used to implement the connection with the transfer terminal 404, and receives the response information of the response of the mobile terminal 404, and measures the signal strength of the response information;
  • the peripheral positioning node B, C sends the response information, and the measured signal strength information to the corresponding control node 103 of the upper layer;
  • each control node 103 returns the received response information and signal strength information together with the corresponding positioning node number to the background system 104;
  • the S1 background system 104 comprehensively analyzes the connection state of the positioning nodes A, B, C and the received signal strength information through a certain software algorithm, and obtains the distance between the mobile terminal 404 and each positioning node A, B, C. Compare information.
  • the present invention also provides a method for indoor positioning of a mobile terminal, comprising the following steps:
  • Step 1 The control end controls the positioning node to send the connection information to the mobile terminal, and receives the response information of the mobile terminal response received by the positioning node, and the signal strength signal of the response signal measured by the positioning node.
  • Step 2 The control end analyzes and calculates the response information and the signal strength information to locate the mobile terminal.
  • control terminal includes a background and a control node connected to the background, and the mobile terminal is a mobile terminal equipped with a 2. 4 GHz radio frequency IC card;
  • the positioning node Under the control of the control node, the positioning node sends connection information to the mobile terminal equipped with the radio frequency IC card; the positioning node receives the response information of the response of the mobile terminal, and measures the signal strength of the response information; the control node receives the sent by the positioning node.
  • the response information and the signal strength information are transmitted to the background together with the number information of the positioning node stored therein; the background analyzes and calculates the received response information and the signal strength information to locate the mobile terminal.
  • the positioning method improves the positioning accuracy of the mobile terminal in the room.
  • the positioning method can be positioned without changing the existing mobile terminal, which reduces the positioning cost and has wide applicability.
  • the invention is particularly applicable to the positioning of mobile terminals located indoors, in a relatively closed environment or in a densely populated environment.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种室内定位移动终端的系统及方法,所述系统包括:控制端,至少一个被安装在室内的定位节点;其中,所述定位节点用于在所述控制端的控制下,在特定区域内向所述移动终端发送连接信息;以及接收所述移动终端响应的应答信息,测量所述应答信息的信号强度,并将所述应答信息以及信号强度信息传送给所述控制端;所述控制端用于对接收到的所述应答信息和所述信号强度信息进行分析计算以对所述移动终端进行定位。应用本发明,使用者在无需更改现有移动终端的情况下,即实现了对室内移动终端的精确定位,且定位简便,方便人们的使用,具有广泛适用性。

Description

一种室内定位移动终端的系统及方法
技术领域
本发明涉及移动通信技术领域,具体而言,尤其涉及一种室内定 位移动终端的系统及方法。 说
背景技术
随着移动通信与移动多媒体应用的大规模普及,带有移动通信和 书
多媒体播放功能的便携式终端设备日渐成了人们日常生活中随身携 带的必须品。 一种 《很高频率的射频 IC 卡装置》 (申请号为: 200710124354. 7 )公开了一种应用于移动终端设备中的 2. 4GHz射频 IC卡装置及其实现方法。 这种 2. 4GHz射频 IC卡装置的一个典型的 应用是将射频 IC卡装置装入手机中,并将 2. 4GHz射频通信距离控制 在一定范围内,从而实现近距离的手机刷卡的功能。由于这种 2. 4GHz 射频 IC卡装置能够极大的改变人们日常的支付方式, 为人们生活提 供便利, 因此, 必将在日常生活中得到大范围的普及。
近年来, 随着人们对基于位置的信息服务(LBS, Loca t ion Based Serv ice)的需求增多,基于位置的服务也得到了广泛的关注。 在大型 商场, 娱乐场所, 超市购物中心, 或停车场等室内环境里, 快速而准 确的对人员进行定位, 对于开展如购物路线引导, 停车指示, 特定区 域商业信息投送等都具有十分积极的意义。
传统的定位移动终端方式主要有 GPS , GSM基站和 Zigbee定位等。 GPS定位方式由于受建筑物遮蔽, 天气因素以及卫星讯号干扰影响较 大, 所以不宜在室内或较封闭环境中使用。 而 GSM定位方式则是基于 蜂窝移动通信的方式, 其本身定位精度低, 一般在 50m以上, 并且其 上、 下行通信同样会受到建筑物屏蔽作用的影响, 尤其在人流聚集的 大型室内环境下通信状况恶劣, 定位功能难以实现。 Zigbee 定位方 式则主要用于工业现场短距离组网和控制通信, Zigbee模块在人们 日常使用的移动终端中并不普遍存在, 因此要使用 Zigbee实现定位 需要有特定的移动终端设备, 成本代价太高, 不适合与人们的日常使 用。
现有的基于位置的信息服务并不能满足人们快速而精确的定位 需求。 因此, 现有技术还有待于改进。 发明内容
本发明要解决的技术问题是针对现有技术的不足,提供一种室内 定位移动终端的系统及方法,能够对现有的位于室内的移动终端进行 快速而精确的定位, 定位筒便, 方便了人们的使用。
为解决上述技术问题, 本发明采用了以下技术方案:
本发明公开了一种室内定位移动终端的系统, 包括: 控制端, 至 少一个被安装在室内的定位节点; 其中, 所述定位节点用于在所述控 制端的控制下, 在特定区域内向所述移动终端发送连接信息, 以及接 收所述移动终端响应的应答信息, 测量所述应答信息的信号强度, 并 将所述应答信息和信号强度信息传送给所述控制端;所述控制端用于 对接收到的所述应答信息和所述信号强度信息进行分析计算以对所 述移动终端进行定位。
进一步, 在本发明的室内定位移动终端的系统中, 所述控制端包 括后台以及与所述后台相连的控制节点;所述控制节点用于控制所述 定位节点向所述移动终端发送连接信息,并将接收到的所述应答信息 和信号强度信息,连同自身存储的所述定位节点的编号信息一起传送 给所述后台;所述后台用于对所述应答信息和信号强度信息进行分析 计算。
进一步, 在本发明的室内定位移动终端的系统中, 所述移动终端 为装有 2. 4GHz射频 IC卡的移动终端。
进一步, 在本发明的室内定位移动终端的系统中, 所述定位节点 包括依次相连的射频接口器件、放大电路以及射频收发天线; 所述射 频接口器件与所述控制节点有线连接;所述射频收发天线与所述移动 终端无线连接, 用于发送所述连接信息以及接收所述应答信息。
进一步, 在本发明的室内定位移动终端的系统中, 所述射频接口 器件以及射频收发天线的频段均为 2. 4GHz。
进一步, 在本发明的室内定位移动终端系统中, 所述控制节点包 括微控制器和与之相连的多路连接器;所述微控制器通过所述多路连 接器与所述的至少一个定位节点有线连接,用于控制所述定位节点向 所述移动终端发送连接信息和连接信息的发射功率,以及将所述应答 信息、 信号强度信息和所述定位节点的编号信息返回给所述后台。
进一步, 在本发明的室内定位移动终端系统中, 所述后台以总线 方式与所述的至少一个控制节点连接。
进一步, 在本发明的室内定位移动终端的系统中, 所述后台至少 对所述两个或两个以上的定位节点返回的应答信息和信号强度信息 进行分析计算以实现对所述移动终端的精确定位, 具体方式为: 所述后台将第一个返回应答信息的定位节点作为原定位节点,并 根据存储在自身的所述原定位节点的记录信息,找到所述原定位节点 的周边定位节点;
所述后台通过所述控制节点,控制所述周边定位节点分别向所述 移动终端发送连接信息,并接收所述周边定位节点返回的应答信息和 信号强度信息;
所述后台根据所述原定位节点以及周边定位节点返回的应答信 息和信号强度信息进行综合分析计算以实现对所述移动终端的精确 定位。
同时, 本发明还提供了一种室内定位移动终端的方法, 包括以下 步骤:
控制端控制定位节点在特定区域内向移动终端发送连接信息,并 接收定位节点接收到的所述移动终端响应的应答信息,以及所述定位 节点测量到的所述应答信息的信号强度信息;
所述控制端对所述应答信息和信号强度信息进行分析计算以对 所述移动终端进行定位。
进一步, 在本发明的室内定位移动终端系统中, 所述控制端包括 后台以及与所述后台相连的控制节点, 所述移动终端为装有 2. 4GHz 射频 IC卡的移动终端;
在所述控制节点的控制下, 所述定位节点向装有射频 IC卡的移 动终端发送连接信息;
所述定位节点接收所述移动终端响应的应答信息,并测量所述应 答信息的信号强度;
所述控制节点接收所述定位节点发送来的所述应答信息和信号 强度信息,连同自身存储的所述定位节点的编号信息一起传送给所述 后台;
所述后台对接收到的所述应答信息和信号强度信息进行分析计 算以对所述移动终端进行定位。
由于采用了以上技术方案, 使本发明具备的有益效果在于: 定位 节点在控制端的控制下, 在特定区域内向移动终端发送连接信息, 以 及接收移动终端响应的应答信息, 测量该应答信息的信号强度, 并将 应答信息和信号强度信息传送给控制端,以及通过控制端来对接收到 的应答信息和信号强度信息进行分析计算的系统设计,使得在无需更 改现有移动终端的情况下, 即实现了对室内移动终端的精确定位, 且 定位筒便, 方便人们的使用, 具有广泛适用性。 附图说明
图 1为本发明一个实施例的系统示意图;
图 2为本发明一个实施例的定位节点的组成示意图;
图 3为本发明一个实施例的控制节点的组成示意图;
图 4为本发明一个实施例的多定位节点的综合测量的示意图。 具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明,所 举实例只用于解释本发明, 并非用于限定本发明的范围。
针对现有定位技术中,在室内、较封闭的环境中对移动终端进行 定位时, 定位精度会急剧恶化的问题, 本发明提出了一种室内定位移 动终端的系统及方法。
该发明的构思是:通过特定的定位节点与存在于一定区域内(如 室内, 较封闭的环境中或人口较密集的环境中)的移动终端, 特别是 与装有 2. 4G射频 IC卡装置的进行无线通信,以及定位节点与控制端 之间进行通信的系统设计,从而使得定位节点在一定范围内接收到的 移动终端响应的应答信息,而且这个范围可以初步满足最低定位精度 要求; 进一步, 在安装定位节点时, 保证其覆盖范围内受到各种外在 物体的干扰较少, 既而测量出的信号强度的精度也高, 因此控制端可 以根据较精确的信号强度定位移动终端,从而提高对室内移动终端的 定位精度。并且由于装有 2. 4G射频 IC卡的移动终端可以广泛地应用 在人们的日常生活中,因此基于这种移动终端的定位系统可以很方便 地开展 LBS服务。 本发明提出的一种室内定位移动终端的系统, 包括: 控制端, 至 少一个被安装在室内的定位节点; 定位节点用于在控制端的控制下, 在特定的区域内向移动终端发送连接信息;以及接收移动终端响应的 应答信息, 测量该应答信息的信号强度, 并将应答信息以及信号强度 信息传送给所述控制端;控制端用于对接收到的应答信息和信号强度 信息进行分析计算以对移动终端进行定位。
需要说明的一点是, 该种室内定位移动终端系统, 可以用于大型 商场, 娱乐场所等室内环境; 但不应理解为只适用于室内环境, 其还 可以用于其他较密闭的环境, 如地下停车场, 隧道或者其他人口较密 集的环境中, 只要能够在该较密闭环境中固定安装定位节点即可。
需要说明的第二点是, 该种定位节点, 只在特定的区域内发送连 接信息, 并且该特定区域的范围是很小的。 也就是说, 该种定位节点 发射的连接信息的覆盖范围是 4艮小的, 一般在 20m左右。 因此, 如果 移动终端能够接收到该定位节点发送的连接信息,则说明移动终端与 该定位节点的距离是很近的, 因此可以初步满足最低定位精度的要 求。 然而, 现有的基站定位或者是 GPS定位方式, 其定位误差一般在 几十米或者上百米,若受到天气、建筑物等影响,其定位精度会更低。 而利用本发明的方法对室内的移动终端进行定位时,由于每个定位节 点的覆盖范围小, 因此, 定位节点测量出来的信号强度信息较精确, 进而控制端能够根据较精确的信号强度信息进行定位,从而使得该种 定位方式的定位精确度比 GSM定位方式和 GPS定位方式都高。
进一步,控制端具体包括后台以及与后台相连的控制节点; 控制 节点与定位节点连接, 用于控制定位节点向移动终端发送连接信息, 并将接收到的应答信息和信号强度信息,连同自身存储的所述定位节 点的编号信息一起传送给所述后台;而后台主要用于对接收到的应答 信息以及该应答信息的信号强度信息进行分析计算, 以定位移动终 端。 实际上, 后台可以是运行在一台计算机上的软件以及存储各控制 节点分布位置的系统记录信息。后台至少会与一个控制节点以总线方 式连接, 并运用一定的软件算法, 对控制节点反馈的应答信息和信号 强度信息进行分析计算, 继而对移动终端进行定位。 当然, 后台还可 以与多个控制节点连接,从而可以对多个控制节点反馈的应答信息和 信号强度信息进行分析计算, 进而对不同的移动终端进行精确 地定位。
在本发明一个具体实施例中, 所述移动终端为装有 2. 4GHz射频 IC 卡的移动终端。 如此选择, 主要是因为该种移动终端可以在短距 离内进行通信, 具备电子钱包等移动支付功能, 势必在人们的日常生 活中得到广泛的应用。 而由于现有的射频 IC卡的频段是基于 2. 4GHz 的,因此,在此可以选择频段为 2. 4GHz的射频 IC卡。利用装有 2. 4GHz 的射频 IC卡的移动终端, 可以实现移动终端与定位节点之间在短距 离内的无线通信, 从而实现对移动终端的精确定位。 因此, 可以在不 改变现有的装有 2. 4GHz射频 IC卡的移动终端的情况下,对该种移动 终端进行精确的室内定位, 且定位方式筒单, 方便了人们的使用。
在本发明的一个具体实施例中,定位节点包括依次相连的射频接 口器件、放大电路以及射频收发天线; 射频接口器件用于与控制节点 有线连接, 用于接收控制节点下发的控制命令, 以及将应答信息和信 号轻度信息传送给控制节点,保证定位节点与控制节点之间的正常的 数据信息交互; 射频收发天线与移动终端无线连接, 用于发送连接信 息以及接收移动终端返回的应答信息。 由于移动终端中的射频 IC卡 的频段是 2. 4GHz , 因此, 射频收发天线的频段选择 2. 4GHz,因为只有 这样, 才能保证定位节点与移动终端之间短距离内正常的移动通信。 同时, 射频接口器件的频段也选择 2. 4GHz , 这样才能保证定位节点 与控制节点之间的正常通信。 实际使用中, 定位节点被固定安装在室内的特定位置上,保证其 覆盖范围内受到各种外在物体的干扰较少;且定位节点与装有 2. 4GHz 射频 IC卡的移动终端进行短距离通信的通信距离为以定位节点为中 心的一定半径范围内。通常情况下, 将这个一定半径范围称为该定位 节点的覆盖范围, 只要移动终端在定位节点的覆盖范围内, 就可以与 定位节点进行无线通信。 通常情况下, 定位节点的覆盖范围的半径小 于 20m。
定位节点在控制节点的控制下, 在 2. 4GHz频点序列的所有频点 上以广播的形式在其覆盖范围内发送连接信息; 移动终端中的射频 IC卡处于该 2. 4GHz频点序列的其中一个频点序列上, 若移动终端处 于该定位节点的覆盖范围内, 则可以接收到定位节点发出的连接信 息, 并返回应答信息, 若移动终端不在定位节点的覆盖范围内, 则接 收不到连接信息。 只要定位节点与移动终端成功连接, 则后台通过计 算, 就可以得到一个移动终端的定位信息。 由于定位节点的覆盖范围 小, 且定位节点覆盖范围内受到各种外在物体干扰较少, 因此, 定位 节点接收到的移动终端响应的应答消息的精度就越高。与现有定位技 术相比, 采用该种定位移动终端的方法一方面能够提高定位精度, 另 一方面, 还保证了该种定位方法的广泛适用性。
并且, 射频接口器件与控制节点之间采用有线连接的方式, 这使 得控制节点接收到的应答消息以及信号强度消息可以几乎不受外界 环境的影响, 顺利地传输到后台并进行相应的处理, 保证了系统的正 常工作。 当然射频接口器件与控制节点也可以采用无线方式连接。
在本发明的一个具体实施例中,控制节点包括 控制器 MCU以及 与之相连的多路连接器;微控制器通过多路连接器与至少一个定位节 点有线连接, 具体是与定位节点内的射频接口器件连接, 主要用于控 制定位节点向移动终端发送的连接信息以及该连接信息的发射功率, 并将该定位节点返回的应答信息和信号强度信息返回给后台。
由此可见,定位节点是否向移动终端发送连接信息是由控制节点 来决定的; 并且, 定位节点向移动终端发射的连接信息的发射功率也 是有控制节点来决定的。控制节点可以通过调节定位节点发送的连接 信息的发射功率来扩大或缩小定位节点的覆盖区域,从而在一定程度 上可以灵活地调节对移动终端的定位精度。
在本发明的一个具体实施例中,后台至少会对两个定位节点或者 两个以上的定位节点返回的应答信息进行分析计算以实现对移动终 端的精确定位, 具体方式为:
后台将第一个返回应答信息的定位节点作为原定位节点,将原定 位节点确定的移动终端的位置确定为初始定位位置。后台根据存储在 自身的原定位节点的记录信息, 寻找原定位节点的周边定位节点; 在 寻找周边定位节点时,后台至少会找一个周边定位节点, 或者更多的 周边定位节点。后台通过控制节点, 控制周边定位节点分别向移动终 端发送连接信息, 并接收周边定位节点返回的应答信息; 最后, 后台 根据原定位节点以及周边定位节点返回的应答信息和信号强度信息 进行综合计算以实现对移动终端的精确定位。
也就是说, 后台先对原定位节点返回的应答信息进行分析计算, 确定移动终端的初始定位位置。再对原定位节点的周边定位节点返回 的应答信息进行分析计算, 并将原定位节点与移动终端之间的距离、 周边定位节点与移动终端之间的距离的进行综合比较,从而确定移动 终端的最后定位位置。通过这种多个定位节点的综合测量,提高定位 的精确度, 实现对移动终端更精确的定位, 满足人们对定位精度的需 求。
需要说明的一点是,控制节点在控制周边定位节点分别向移动终 端发送连接信息的时候, 周边定位节点不需要在 2. 4GHz的所有频点 序列上发送连接信息 ,只需要在原定位节点成功连接的移动终端响应 的应答信息生成的 2. 4G频点序列的信道地址上发送即可。
实施例:
下面详细描述该种室内定位移动终端的系统:
如图 1-3所示:该种室内定位移动终端的系统,运用在基于 2. 4G 射频 IC卡的移动终端上。 该种定位系统包括: 移动终端 101 , 定位 节点 102 , 控制节点 103和后台系统 1 04。 移动终端 101是一个装有 2. 4G射频 IC卡装置的移动终端。 如图 2所示, 定位节点 102 , 由工 作在 2. 4G频段的射频接口器件 201 , 信号放大电路 202 , 以及 2. 4G 射频收发天线 203组成。定位节点 102通过有线连接方式与控制节点 103连接, 接收控制节点 103的控制命令并反馈数据信息。 如图 3所 示, 控制节点 103 , 包含一个微控制器 MCU 301和一个多路器件 302。 控制节点可以通过多路器件 302与一个或多个定位节点连接。后台系 统 104 可以是一个运行在通用计算机上的软件以及存储各节点分布 位置的系统记录信息。
图 4为本发明一个实施例的多定位节点的综合测量的示意图。下 面, 结合图 4详细介绍该室内定位移动终端系统的工作流程, 如图 4 所示:
51、 装有 2. 4G射频 IC卡的移动终端 404在室内的运动平面 406 内, 并进入 A定位节点的覆盖区域 402内的某个位置 405上;
52、 移动终端 404处于 2. 4G频点序列的某个随机频点上, 控制 节点 103控制定位节点 A在 2. 4G频点序列的所有频点上发送连接信 息;
53、移动终端 404响应定位节点 A发送的连接信息, 并返回对应 的应答信息, 该应答信息包括移动终端自身唯一身份识别号;
54、定位节点 A接收该应答信息,并测量该应答信息的信号强度, 并将该应答信息和应答信息的信号强度信息回送给控制节点 103;
55、 控制节点 103将定位节点 A的编号, 连同收到的移动终端 404返回的应答信息和定位节点测量得到的信号强度信息一同反馈给 后台 104;
56、后台 104 ^据定位节点 A的编号, 确定移动终端 404处于以 该定位节点 A安装位置为中心的 20m的范围内,从而实现目标的初步 定位; 此时将定位节点 A称为原定位节点;
57、后台 104从后台自身存储的记录信息中找到原定位节点 A的 周边定位节点 B和 C的信息;
58、 在控制节点 103的控制下, 周边定位节点 B, C在由成功连 接的移动终端 404的响应的应答信息生成的 2. 4G频点序列的信道地 址上, 分别依次向移动终端 404发送连接信息以实现与移送终端 404 的连接, 并接收移动终端 404响应的应答信息, 测量应答信息的信号 强度;
59、 周边定位节点 B, C将应答信息, 以及测量得到的信号强度 信息回送给上层对应的控制节点 103;
S10、 各控制节点 103将收到的应答信息和信号强度信息, 连同 相应的定位节点的编号一同反馈给后台系统 104;
S1 后台系统 104通过一定的软件算法, 对定位节点 A, B, C 的连接状态和接收到的信号强度信息进行综合分析,得到该移动终端 404与各个定位节点 A, B, C之间距离的比较信息。
同时, 本发明还提供了一种室内定位移动终端的方法, 包括以下 步骤:
步骤一,控制端控制定位节点向移动终端发送连接信息, 并接收 定位节点接收到的所述移动终端响应的应答信息,以及所述定位节点 测量到的所述应答信 , 的信号强度信 , ; 步骤二,所述控制端对所述应答信息和信号强度信息进行分析计 算以对所述移动终端进行定位。
在该实施例中,所述控制端包括后台以及与所述后台相连的控制 节点, 所述移动终端为装有 2. 4GHz射频 IC卡的移动终端;
在控制节点的控制下, 定位节点向装有射频 IC卡的移动终端发 送连接信息; 该定位节点接收移动终端响应的应答信息, 并测量该应 答信息的信号强度;控制节点接收定位节点发送来的所述应答信息和 信号强度信息, 连同自身存储的定位节点的编号信息一起传送给后 台;后台对接收到的应答信息和信号强度信息进行分析计算以对移动 终端进行定位。
在具体应用本发明时, 在基于现有的人们常使用的装有 2. 4GHz 射频 IC卡的移动终端的情况下, 在控制端的控制下, 利用特定定位 节点与移动终端之间在特定区域内的无线通信,即实现了对室内移动 终端的精确定位, 且定位筒便, 方便人们的使用。 与传统的 GSM定位 方式和 GPS定位方式相比,该种定位方式提高了对室内的移动终端的 定位精度。 而与 Zigbee定位方式相比, 该种定位方式无需更改现有 的移动终端, 即可进行定位, 降低了定位成本, 具有广泛适用性。 本 发明尤其适用于位于室内,较封闭的环境中或人口较密集的环境中的 移动终端的定位。
以上内容是结合具体的实施方式对本发明所作的进一步详细说 明, 不能认定本发明的具体实施只局限于这些说明。 对于本发明所属 技术领域的普通技术人员来说, 在不脱离本发明构思的前提下,还可 以做出若干筒单推演或替换, 都应当视为属于本发明的保护范围。

Claims

权 利 要 求 书
1、 一种室内定位移动终端的系统, 其特征在于, 包括: 控制端, 至少一个被安装在室内的定位节点; 其中,
所述定位节点用于在所述控制端的控制下,在特定区域内向所述 移动终端发送连接信息, 以及接收所述移动终端响应的应答信息, 测 量所述应答信息的信号强度,并将所述应答信息以及信号强度信息传 送给所述控制端;
所述控制端用于对接收到的所述应答信息和所述信号强度信息 进行分析计算以对所述移动终端进行定位。
2、 如权利要求 1所述的系统, 其特征在于, 所述控制端包括后 台以及与所述后台相连的控制节点;所述控制节点用于控制所述定位 节点向所述移动终端发送连接信息,并将接收到的所述应答信息和信 号强度信息,连同自身存储的所述定位节点的编号信息一起传送给所 述后台; 所述后台用于对所述应答信息和信号强度信息进行分析计 算。
3、 如权利要求 2所述的系统, 其特征在于, 所述移动终端为装 有 2. 4GHz射频 IC卡的移动终端。
4、 如权利要求 2所述的系统, 其特征在于, 所述定位节点包括 依次相连的射频接口器件、放大电路以及射频收发天线; 所述射频接 口器件与所述控制节点有线连接;所述射频收发天线与所述移动终端 无线连接, 用于发送所述连接信息以及接收所述应答信息。
5、 如权利要求 4所述的系统, 其特征在于, 所述射频接口器件 以及射频收发天线的频段均为 2. 4GHz。
6、 如权利要求 2所述的系统, 其特征在于, 所述控制节点包括 微控制器和与之相连的多路连接器;所述微控制器通过所述多路连接 器与所述的至少一个定位节点有线连接,用于控制所述定位节点向所 述移动终端发送连接信息和连接信息的发射功率,以及将所述应答信 息、 信号强度信息和所述定位节点的编号信息返回给所述后台。
7、 如权利要求 2至 6任一项所述的系统, 其特征在于, 所述后 台以总线方式与所述的至少一个控制节点连接。
8、 如权利要求 2至 6任一项所述的系统, 其特征在于, 所述后 台对所述两个或两个以上的定位节点返回的应答信息和信号强度信 息进行分析计算以实现对所述移动终端的精确定位, 具体方式为: 所述后台将第一个返回应答信息的定位节点作为原定位节点,并 根据存储在自身的所述原定位节点的记录信息,找到所述原定位节点 的周边定位节点;
所述后台通过所述控制节点,控制所述周边定位节点分别向所述 移动终端发送连接信息,并接收所述周边定位节点返回的应答信息和 信号强度信息;
所述后台根据所述原定位节点以及周边定位节点返回的应答信 息和信号强度信息进行综合分析计算以实现对所述移动终端的精确 定位。
9、 一种室内定位移动终端的方法, 其特征在于, 包括以下步骤: 控制端控制定位节点在特定区域内向移动终端发送连接信息,并 接收定位节点接收到的所述移动终端响应的应答信息,以及所述定位 节点测量到的所述应答信息的信号强度信息;
所述控制端对所述应答信息和信号强度信息进行分析计算以对 所述移动终端进行定位。
10、 如权利要求 9所示的方法, 其特征在于, 所述控制端包括后 台以及与所述后台相连的控制节点, 所述移动终端为装有 2. 4GHz射 频 IC卡的移动终端;
在所述控制节点的控制下, 所述定位节点向装有射频 IC卡的移 动终端发送连接信息;
所述定位节点接收所述移动终端响应的应答信息,并测量所述应 答信息的信号强度;
所述控制节点接收所述定位节点发送来的所述应答信息和信号 强度信息,连同自身存储的所述定位节点的编号信息一起传送给所述 后台;
所述后台对接收到的所述应答信息和信号强度信息进行分析计 算以对所述移动终端进行定位。
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